> For the complete documentation index, see [llms.txt](https://docs.apica.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.apica.io/data-sources/time-series-databases.md).

# Time Series Databases

A **time-series database (TSDB)** is a software system that is optimized for storing and serving time series through associated pairs of time(s) and value(s).
